Excavator.



F. LEMOINE.

EXCAVATOR.

APPLICATION FILED NOV. 26. 1915.

1',23' ,70e1:. Patented Aw. 7,1917.

3 SHEETS-SHEET I.

INVENTOR WITNESSES ,wmm

F. LEMOINE.

EXCAVATOR.

APPLICATION FILED NOV. 26. m5.

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EXCAVATOR.

APPLIQATION FILED NOV. 26, 1915.

Patented Aug. 7, 1917.

3 SHEETS-SHEET 3.

INVENTOR} fi WITNESSES #6 fig rnAivors LEMOINE, or MONTREAL,"QUEBEG,cAnADA.

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Specification of Letter s iatent. gt nt 1 03 7,1917;

Application filed November 26, 1915. S:erial1 To.'63,645. i

construction permitting the body of the machine to be swung considerablyout of line or to one side of the derrick beam.

Another object is to provide a machine that may rest continually onsolid ground when digging trenches or other excavations, thuseliminating bracing of trenches, scaffoldings to support the machine. Afurther object is to provide simple, efficient and compact devices forguiding the bucket lifting cables, per part of the derrick beam.

In order to more clearly disclose the construction, operation and use ofthe invention, reference should be had to the accompanying drawingsforming part of the present application. Throughout the several figuresof the drawings, like reference characters designate the same parts 2-In the drawings, Figure 1 is a side elevation;

Fig. 2 is a front view;

Fig. 3 is a view similar to Fig. 1, the dotted lines indicating thebucket beam as stowed away.

Fig. 4; is a top plan view of the invention;

Fig. 5 is a top plan view of the lower set;

Fig. 6 is a side elevation of Fig. 5.

Fig. 7 is a top plan view of the upper set of rope guides; and Fig. 8 isa side elevatlon of Fig. 7.

With reference to the drawings; 1 is the body of the machine; 2 are thehoisting winches; 3 is the supporting truck; 45* is the turn tablesuitably mounted on a turning gear; 5 is a derrick beam and 6 is abucket beam; 7 is a mechanism for driving the bucket beam gear andpinion.

To the lower end of the derrick beam is securely fixed a ball head 1adapted to be universally seated in a cooperating cup shaped socket 2formed in a plate 3 which is made fast to the forward part of themawhere they pass through the upchine body; The socket is provided withtwo diametrically opposite perforations 4: and thehead is provided witha plurality of bores 5 extending diametrically through it,

at difierent angles. A suitable lockingpin 6 passed through theperforations 4 and one of the bores alined therewith, will securely lockthe derrick beamso that it will have only a vertical swing about the pinas an axls or pivot. Onthe other hand, the ball and socket or" universalcoupling 1 and 2 clear to one side of the beam at any time desired; Thepin may then be slipped in and the beam is looked, as described.

To the lower end of the lifting derrick is also-secured an angle plate 7Between this and a shoulder 8 of the bracket 9which carries the ball 1are jou'rn'aled a pair of grooved guide rockers '10 between which ispassed the draft cable 11 for performing the digging operation. Thus,when the body of the machine is swung to one side or the other, one orthe other of the guide'rollers will engage the draft cable and-guide ittoward thewiiichwithout binding. i

i In the'present machine the excavating is done with a draw out,upwardly toward the machine, instead of'the usual downward and outwardthrust or push.

The result is maximum digging power with minimum effort. This isaccomplished by securing one end of the cable 11 to the bucket, passingit up through the lower end of the derrick beam and between the guidepulleys 10 and thence on to its connection with the winding drum of itswinch. The draft cable, of course, accomplishes all of the diggingaction with the aid of the bucket beam. The pinion for raising andlowering the bucket beam is operated in the usual way, but, in thedigging operation simply lifts or lowers the bucket beam graduallyaccording to need as the bucket is drawn in by the draft cable. Theminimum force is required, of course, to actuate the bucket beam, inthis arrangement.

One important feature ofthe invention is that the'stability of themachine is always assured as the machine travels on the even surface ofthe roadway and leaves the excavation after it instead of, as atpresent, following up the excavation and traveling on scaffoldings or onthe uneven bed thereof.

To the top .of the excavation bucket is secured a lifting cable 12, toassist in'lifting permit'the body of the machine'to swing the loadedbucket as well as to add to the upward pull during the excavatingoperation if desired. This cable is passed over an obliquely mountedvertical guide roller 13, thence over an obliquely mounted horizontalguide roller 14, and thence through a guide slot in the journal uprightof the vehicle body and finally connected to its winch.

This arrangement keeps the cable away from the bucket beam and preventsall possi bility of twisting or entangling.

As shown in dotted lines in Figs. 2 and 4:, the body of the machine maybe swung to a considerable angle to either side without in the leasthindering the work of excavation.

A most important advantage of this improved excavator lies in the factthat it will be possible to dig'alongside of a building, a conduit, asidewalk, without the possibility of causing damages thereto, while withthe excavators now in use, it is impossible to dig alongside of asidewalk and usually in such cases, the work has to be done by hand.

As before stated, another important point is that the machine by drawingthe bucket toward the truck will permit the operator to keep the machineon unexcavated ground, while with the machines now in use, scaffoldingshave to be built to support the machine over the trench as the machinefollows up the excavation.

It is thought that the construction, operation, and use of the inventionwill be clear from the preceding detailed description.

Changes may be made in the construction,

arrangement and disposition of the several parts of the inventionwithout in any way departing from the field and scope of the same and itis meant to include all such in this application wherein only apreferred form has been disclosed.

What I claim is 1. In an excavator, the combination of a truck, a framemounted on the truck and adapted to be adjusted about a Vertical axis, asocket member on the frame, a derrick beam having its inner end mountedin said socket, adjustable means connecting the base and socket wherebythe beam may be maintained parallel with the length of the truck ineither of several adjusted positions of the frame, a digging bucketcarried by the beam, and means for moving the bucket relative to theframe.

2. In combination with an. excavator, a socket adapted to be secured tothe forward part of the frame thereof, and provided with pivot pinholes, a derrick beam, a head secured to said derrick beam andcooperating with said socket and provided with a plurality of boresadapted to be alined with the holes of the socket and a pivot pinadapted to be passed through said holes and bores selectively.

Signed at Montreal, Quebec, Canada, this 8th day of October, 1915.

FRANCIS LEMOINE.

Witnesses D. ROSE, C. LEFEBVER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. O.

